e*thirteen Helix Race Alloy GR Cranks - 160mm Length, 73mm Spindle, Sterling Silver

Engineered in direct collaboration with World Cup Downhill and Enduro athletes, the e*thirteen Helix Race Alloy GR Cranks represent a heavy-duty masterclass in aluminum drivetrain design. Purpose-built to endure the absolute brutal forces of big bike park laps, technical freeride lines, and high-velocity enduro racing, these cranks easily exceed ASTM 5 gravity standards. Blending a striking aesthetic with relentless structural integrity, the Helix Race GR is a work of art that is meticulously optimized to take a severe beating on the trail while maintaining elite-level performance.

The arms are expertly forged from premium AL-6066-T6 aluminum and undergo precise CNC-sculpting to eliminate unneeded weight while maximizing lateral stiffness under high torque loads. This model features a 73mm spindle width, making it fully compatible with all mountain bike frames utilizing a standard 68/73mm threaded or press-fit bottom bracket shell layout. The core of the crankset revolves around an oversized 30mm AL 7050-T7 aluminum spindle that utilizes e*thirteen’s proven P3 Connect polygon interface, maximizing surface contact to eliminate interface play and ensure flawless, creak-free power transfer when stomping on the pedals.

At an optimized, short 160mm length, these crank arms provide vital ground clearance on modern, low bottom-bracket frame geometries. Shorter crank lengths drastically reduce the risk of high-speed pedal strikes through technical rock gardens and compressed g-out corners, giving you the confidence to carry momentum without holding back. For precise bearing setup and easy, tool-free maintenance, the crankset features e*thirteen’s Adaptive Preload System (APS) adjuster to quickly dial out lateral play, alongside an integrated alloy self-extractor bolt setup that makes routine workshop servicing highly efficient.

Weighing in at a highly competitive 584g, this premium component is finished in a brilliant, raw Sterling Silver anodizing that resists shoe rub and trail wear. e*thirteen packs the Helix Race GR with exceptional attention to detail, including custom-fitted molded polymer crank boots for direct rock strike defense and high-durability polymer decals to shield the arm faces from scratches. Designed for riders who demand ultimate strength-to-weight optimization on aggressive gravity builds, this crankset is backed by a dependable 5-year manufacturer warranty.

Chainring Compatibility Note: This 73mm spindle configuration is designed to achieve a modern 55mm chainline. It requires a standard e*thirteen Helix direct-mount chainring (Helix Race, Helix Plus, or Helix Steel DM variants). It is explicitly not compatible with Helix SL or UL chainrings.

Key Features

• Exceeds ASTM 5 Gravity Standards: Laboratory tested and World Cup proven to withstand intense downhill, enduro, and freeride riding


• Forged & CNC-Machined AL-6066-T6 Arms: Provides an optimized strength-to-weight ratio with a premium sculpted finish that resists lateral flexing


• Oversized 30mm Spindle Architecture: High-strength AL 7050-T7 aluminum spindle minimizes bottom bracket flex under aggressive out-of-the-saddle efforts


• P3 Connect Polygon Interface: Elite spindle joint maximizes surface engagement to deliver a robust, play-free, and creak-free mechanical connection


• Rock-Clearing 160mm Length: Preferred gravity length maximizes ground clearance on low-BB geometries, effectively eliminating pedal strikes


• Adaptive Preload System (APS): Integrated wave-style preload adjuster ring allows quick micro-adjustments to eliminate side-play without binding bearings


• Comprehensive Hardware Kit: Includes heavy-duty molded impact boots, protective polymer decals, an integrated self-extractor, and a custom BB/lockring installation tool

Specifications

• Model: e*thirteen Helix Race Alloy GR Cranks


• Crank Arm Length: 160mm


• Spindle Diameter: 30mm


• Spindle Width: 73mm


• Spindle Interface: P3 Connect Polygon


• Frame BB Shell Compatibility: Standard 68mm / 73mm Bottom Bracket Shells


• Chainline Target: 55mm


• Chainring Compatibility: Helix Race, Helix Plus, or Helix Steel Direct Mount (Not compatible with SL/UL)


• Material (Arms): Forged, CNC-Machined AL 6066-T6 Aluminum


• Material (Spindle): High-Grade AL 7050-T7 Aluminum


• Weight: 584g (73mm x 160mm configuration)


• Color: Sterling Silver


• Warranty: 5 Years

An elite, athlete-refined 160mm alloy gravity crankset combining ASTM 5 huckproof strength, a 30mm polygon spindle, and a stunning sterling silver finish for riders who demand ultimate durability on the world's roughest tracks.